Check-valve



(-No Model.)

L. vSCHUTTE. GHEGK VALVE.

No. 516,407 7 Patented Mar. 13, 1894.

LOUIS SCHUTTE, OF PHILADELPHIA, PENNSYLVANIA.

CHECK-VALVE.

' SPECIFICATION forming part of Letters Patent No. 516,407, dated March 13, 1894.

Application @ed June 6, 1893. Serial No. 476.725- (No model.)

To aZZ whom it may concern.- ed to receive and be closed bya valve proper Be it known that I, LOUIS SOHUTTE, of 0, thus closing the passage through the eas- Philadelphia, county of Philadelphia, and ing. The valve proper is provided atits cen- State of Pennsylvania, have invented a new ter with oppositely extending flanges o, c to 5 and useful Improvement in Check-Valves, of which are connected by horizontal transverse which the following is a specification. pivots c the upper and lower ends respect- My invention relates to horizontally movively of sustaining links D, D, the opposite ing check valves, the object being to provide ends of said links being pivoted on horizontal 6: a valve of this character which will be baltransverse axes to the valve casing at opposite 1o anced so that the resistance offered toits opensides of the valve as shown at d, (1'.

ing and closing movements will be reduced From this description it will be seen that to a minimum. the valve is suspended, as it were, by the two The invention is particularly applicable oppositely extending links this arrangement where currents of low pressure are employed, admitting of the movement of the valve hori- I 5 such as the exhaust from engines, pumps or zontally. It will also be seen that the tendvacuum pans, though it is not necessarily ency of the valve to open and close will deconfined in its application to such uses, and pend upon the relations of the center of gravmaybe employed wherever the circumstances ity of the valve to the pivoted axes c 0 of are such as to require a balanced horizontally the support, and by suitably proportioning 20 moving check valve. the parts of the valve and adjusting the rela- The invention consists primarily in comtions of the axes, and the center of gravity of bining with a valve seat, a horizontally movthe valve, the amount of pressure necessary ing valve adapted to close the same and susto close or open the valve and the correspondtained so as to be moved back and forth by ing amount of resistance to its movements 25 links or equivalent supports pivotally 'conmay be reduced to a minimum, sothat the nected to the valve on opposite sides of the valve will be truly balanced and will respond same. quickly to the least variation of pressure on The invention also consists in a stop conits opposite sides. It will also be noted that structed to limit the movement of the valve or the movement of the center of gravity is prac- 0 to regulate the length of its throw. tically in a straight line as indicated at E.

The invention also consists in the details of Its center of gravity moving thus, it will reconstruction and combination of parts herequire, of course, less force to move the valve inafter described and claimed. than it would, if the center of gravity moved In the accompanying drawings, Figure l, is obliquely, or in a path other than truly hori- 3 5 a vertical sectional elevation of a valve and zontal.

casing havingmyinvention embodied therein, In order that the opening movement of the thevalve being closed and an adjustable stop valve may be limited, I provide a stop for the being shown to regulate its movement. Fig. same 2, is a similar view with the valve opened, a In Fig. 1, I have represented the stop as ado fixed stop being shown to limit its opening j ustable, so that the movements of the valve movement. Fig. 3, is a similar view ofamodimay be regulated or varied. In this figure fied form of the valve and its connections and the upper side of the casing is provided with of the limiting stop. I a depending boss F, having a vertical open- 5 Referring to Figs. 1 and 2, A represents a ing therein, on the upper side of which is 4 5 suitable casing containing a horizontal pasfixed a neck f,into which is threaded a spinsage therethrough and provided with necks dle f, the lower end f* of which extends a, a, by means of which the casing may be through the boss in the casing to the interior connected between the adjacent ends of pipe of the same. The upper end of the spindle roo sections, or may be applied in other connecis provided with a hand wheel f The lower 5o tions according to the use to which-the valve end of the spindle is in position to be encounis put may require. This casing is provided tered by the upper edge of the link D, when at one side withaverticalvalveseatB,adaptthe valve is opened, and by screwing the spindle down through the casing, it is obvious that the end of the spindle may be adjusted in different positions to be encountered by the link, and thus vary the movement of the valve. In Fig. 2 the stop is in the form of a fixed depending boss f projecting'downward into the casing from its upper side in position to be encountered by the upper edge of the link D as in the first instance.

In Fig. 3, I have represented a modification of my valve and of the stop. In this figure it will be seen that the flanges to which the supporting links are pivoted do not extend in line with the center of gravity, but project at upper and lower sides of the same. This difference in the location of the pivotal connections of the valve with its supports, affects in no manner the movement or operation of the valve. The stop in this figure is represented as being in the form of a lugf projecting from the lower side of the valve proper, in such position that when the valve is opened, its end will encounter the sustaining link D, and thus limit the movement of the valve.

Having thus described my invention, I claim" 1. The combination of the casing provided with a vertical valve seat, a horizontally movable valve to close the same, and movable supports sustained by the casing and pivoted to the valve on opposite sides of the same.

2. In a check valve the combination of the casing provided with a vertical valve seat, a horizontally movable valve, and links pivoted at their upper and lower ends respectively to the opposite sides of the valve on horizontal transverse axes, and pivoted at their opposite ends to the casing.

3. In a check valve the combination of the casing provided with a vertical valve seat, a horizontally movable valve provided at its center on opposite sides with flanges, and links pivoted at their upper and lower ends respectively to the flanges and pivoted at their opposite ends to the casing. I

4. In a check valve the combination with the casing provided with a valve seat, of a horizontally movable valve, a link pivoted at its upper end to the casing and at its lower end to the valve, a second link pivoted at its lower end to the casing and at its upper end to the valve, and a stop fixed to the casing in position to be engaged by the last named link and limit the motion of the valve.

5. In a check valve the combination of the casing provided with a valve seat, a horizontally movable valve, a link pivoted at its upper end to the casing and at its lower end to the valve, a second link pivoted at its lower end to the casing, and at its upper end to the valve, and a vertically adjustable stop mounted in the casing with its lower end in position to be engaged by the last named link.

In testimony whereof I hereunto set my hand, this 23d day of May, 1893, in the presence of two attesting witnesses.

LOUIS SCHUTTE.

\Vitnesses:

DANIEL WATSON HILDRETI-I, MAURICE FRANCIS SPILLIN. 

